8 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 50588 | Storm Lake | 13,431 |
| 51002 | Alta | 2,787 |
| 50568 | Newell | 1,384 |
| 50585 | Sioux Rapids | 1,080 |
| 50510 | Albert City | 1,042 |
| 50565 | Marathon | 380 |
| 50576 | Rembrandt | 277 |
| 50592 | Truesdale | 187 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 8 ZCTAs in Buena Vista County, Iowa (US Census).